4003649856 has 140 divisors (see below), whose sum is σ = 12046252768. Its totient is φ = 1314517248.

The previous prime is 4003649849. The next prime is 4003649857. The reversal of 4003649856 is 6589463004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4003649857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 341565 + ... + 353091.

Almost surely, 2^4003649856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4003649856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6023126384).

4003649856 is an abundant number, since it is smaller than the sum of its proper divisors (8042602912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4003649856 is a wasteful number, since it uses less digits than its factorization.

4003649856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11618 (or 11599 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 4003649856 is about 63274.4012693917. The cubic root of 4003649856 is about 1587.8837206299.

The spelling of 4003649856 in words is "four billion, three million, six hundred forty-nine thousand, eight hundred fifty-six".